A compass will provide you with a direction from 0° to 360°. A Solar PV system works best facing as close to due south as possible.
If you have an installation facing South West, your compass may say 225°. Therefore to enter into the software, simply subtract 180 from 225 which will leave a figure of 45°, the system is 45° away from south.
For any further questions please speak to your Mentor on Freephone 01244 784 260 or email [email protected]